Which statement is true?

vazorg [7]

Answer:

The reason behind fire in water when nail polish is added is the presence of acetone which is a flammable substance. Acetone, commonly known as dimethyl ketone or 2-propanone, is a flammable chemical in nail polish. Acetone is flammable as well as poisonous when it comes contact with moisture.

Explanation:

The reason behind fire in water when nail polish is added is the presence of acetone which is a flammable substance. Acetone, commonly known as dimethyl ketone or 2-propanone, is a flammable chemical in nail polish. Acetone is flammable as well as poisonous when it comes contact with moisture.

5 0

3 years ago

What is the direction of the centripetal force when applied to an object?

mihalych1998 [28]

For an object moving in a path that's a circle or a part of one,
the centripetal force acts in the direction toward the center of
the circle. That direction is perpendicular to the way the object
is moving.

3 0

3 years ago

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Define Dissociation and Ionization?

STatiana [176]

Answer:

Dissociation- disconnection and lack of continuity between thoughts, memories, surroundings, actions, and identity.

Ionization- the process by which an atom or a molecule acquires a negative or positive charge by gaining or losing electrons, often in conjunction with other chemical changes.

Explanation:

7 0

3 years ago

The sun is the driving force behind each of these kinds of energy except.........

m_a_m_a [10]

The sun is the original source of solar energy, hydroelectric energy, food energy, coal energy, oil energy, and wind energy.

The sun is NOT the original source of <em>nuclear energy. (b)</em>

3 0

3 years ago

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A ball of mass 0.075 kg is fired horizontally into a ballistic pendulum. The pendulum mass is 0.350 kg. The ball is caught in th

Tatiana [17]

1) In the initial situation, the total mechanical energy of the system is given only by the kinetic energy of the ball that is moving with speed v:
$E_i =K= \frac{1}{2}m_b v^2$
where $m_b = 0.075 kg$ is the mass of the ball.

In the final situation, where the system (ball+pendulum) rises a vertical distance of h=0.145 m, the system is stationary (v=0) so the total mechanical energy of the system is the gravitational potential energy:
$E_f = U = (m_b+m_p)gh$
where $m_p = 0.350 kg$ is the mass of the pendulum.

For the law of conservation of energy, $E_i=E_f$ , so we can find the initial speed v of the ball:
$\frac{1}{2}m_bv^2 = (m_b+m_p)gh$
$v= \sqrt{ 2 \frac{m_b+m_p}{m_b}gh } =4.0 m/s$

2) The kinetic energy lost in the collision is the initial kinetic energy of the ball:
$K= \frac{1}{2}m_bv^2= \frac{1}{2}(0.075 kg)(4.0 m/s)^2=0.6 J$

8 0

3 years ago